重写父映像docker容器命令以在

我想更改用户密码并针对DB2容器映像运行SQL脚本。如何执行父映像所要求的任何操作，但在完成后运行一些命令？我需要使用docker compose来运行它，因为数据库将用于支持验收测试。在我的docker-compose.yml文件中，我有一个command属性，但我检查了容器，没有看到touch语句的结果，因此它从未运行过

我的docker-compose.yml文件是：

version: "3.2"
services:
  ssc-file-generator-db2-test:
    container_name: "ssc-file-generator-db2-test"
    image: ibmcom/db2:latest
    command: /bin/bash -c "touch /command-run && echo \"db2inst1:db2inst1\" | chpasswd && su db2inst1 && db2 -tvf /db2-test-scaffolding/init.sql"
    hostname: db2server
    privileged: true
#    entrypoint: ["/bin/sh -c ]
    ports:
      - 50100:50000
      - 55100:55000
    networks:
      - back-tier
    restart: "no"
    volumes:
      - db2-test-scaffolding:/db2-test-scaffolding
    env_file:
      - acceptance-run.environment
# ssc-file-generator:
#   container_name: "ssc-file-generator_testing"
#     image: ssc-file-generator
#     depends_on: ["ssc-file-generator-db2-test]
#     command: 
#    env_file: ["acceptance-run.environment"]

networks:
  back-tier: {}
volumes:
  db2-test-scaffolding:
    driver: local
    driver_opts:
      o: bind
      type: none
      device: ./db2-test-scaffolding  

验收运行环境

BCUPLOAD_DATASOURCE_DIALECT=org.hibernate.dialect.DB2Dialect
BCUPLOAD_DATASOURCE_DRIVER=com.ibm.db2.jcc.DB2Driver
BCUPLOAD_DATASOURCE_PASSWORD=bluecost
BCUPLOAD_DATASOURCE_URL=jdbc:db2://localhost:50100/mydb:currentSchema=FILE_GENERATOR
BCUPLOAD_DATASOURCE_USERNAME=bluecost
B2INSTANCE=db2inst1
DB2INST1_PASSWORD=db2inst1
DBNAME=MYDB
DEBUG_SECRETS=true
file-generator.test.files.path=src/test/acceptance/resources/files/
# Needed for DB2 container
LICENSE=accept

docker的形象是

ibmcom/db2:latest

为了方便起见，这是docker inspect ibmcom/db2:latest

[
    {
        "Id": "sha256:e304e217603b80b31c989574081b2badf210b4466c7f74cf32087ee0a1ba6e04",
        "RepoTags": [
            "ibmcom/db2:latest"
        ],
        "RepoDigests": [
            "ibmcom/db2@sha256:77da4492bf18c49a1012aa6071a16aee0039dca9c0a2a492345b6b030714a54f"
        ],
        "Parent": "",
        "Comment": "",
        "Created": "2021-03-29T18:54:36.94484751Z",
        "Container": "e59bda8065b72a0e440d145d6d90ba77231a514e811e66651d4fa6da98a34910",
        "ContainerConfig": {
            "Hostname": "6125cd0dc6e6",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "22/tcp": {},
                "50000/tcp": {},
                "55000/tcp": {},
                "60006/tcp": {},
                "60007/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "container=oci",
                "STORAGE_DIR=/database",
                "HADR_SHARED_DIR=/hadr",
                "DBPORT=50000",
                "TSPORT=55000",
                "SETUPDIR=/var/db2_setup",
                "SETUPAREA=/tmp/setup",
                "NOTVISIBLE=in users profile",
                "LICENSE_NAME=db2dec.lic"
            ],
            "Cmd": [
                "/bin/sh",
                "-c",
                "#(nop) ",
                "ENTRYPOINT [\"/var/db2_setup/lib/setup_db2_instance.sh\"]"
            ],
            "Image": "sha256:e65b35603167c75a86515ef4af101a539cbbdf561bcb9efd656d17b8d867c7da",
            "Volumes": {
                "/database": {},
                "/hadr": {}
            },
            "WorkingDir": "",
            "Entrypoint": [
                "/var/db2_setup/lib/setup_db2_instance.sh"
            ],
            "OnBuild": [],
            "Labels": {
                "architecture": "x86_64",
                "build-date": "2021-03-10T06:09:00.139818",
                "com.redhat.build-host": "cpt-1007.osbs.prod.upshift.rdu2.redhat.com",
                "com.redhat.component": "ubi7-container",
                "com.redhat.license_terms": "https://www.redhat.com/en/about/red-hat-end-user-license-agreements#UBI",
                "description": "The Universal Base Image is designed and engineered to be the base layer for all of your containerized applications, middleware and utilities. This base image is freely redistributable, but Red Hat only supports Red Hat technologies through subscriptions for Red Hat products. This image is maintained by Red Hat and updated regularly.",
                "distribution-scope": "public",
                "io.k8s.description": "The Universal Base Image is designed and engineered to be the base layer for all of your containerized applications, middleware and utilities. This base image is freely redistributable, but Red Hat only supports Red Hat technologies through subscriptions for Red Hat products. This image is maintained by Red Hat and updated regularly.",
                "io.k8s.display-name": "Red Hat Universal Base Image 7",
                "io.openshift.tags": "base rhel7",
                "name": "ubi7",
                "release": "338",
                "summary": "Provides the latest release of the Red Hat Universal Base Image 7.",
                "url": "https://access.redhat.com/containers/#/registry.access.redhat.com/ubi7/images/7.9-338",
                "vcs-ref": "a4e710a688a6374670ecdd56637c3f683d11cbe3",
                "vcs-type": "git",
                "vendor": "Red Hat, Inc.",
                "version": "7.9"
            }
        },
        "DockerVersion": "19.03.6",
        "Author": "db2_download_and_go",
        "Config": {
            "Hostname": "6125cd0dc6e6",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "22/tcp": {},
                "50000/tcp": {},
                "55000/tcp": {},
                "60006/tcp": {},
                "60007/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "container=oci",
                "STORAGE_DIR=/database",
                "HADR_SHARED_DIR=/hadr",
                "DBPORT=50000",
                "TSPORT=55000",
                "SETUPDIR=/var/db2_setup",
                "SETUPAREA=/tmp/setup",
                "NOTVISIBLE=in users profile",
                "LICENSE_NAME=db2dec.lic"
            ],
            "Cmd": null,
            "Image": "sha256:e65b35603167c75a86515ef4af101a539cbbdf561bcb9efd656d17b8d867c7da",
            "Volumes": {
                "/database": {},
                "/hadr": {}
            },
            "WorkingDir": "",
            "Entrypoint": [
                "/var/db2_setup/lib/setup_db2_instance.sh"
            ],
            "OnBuild": [],
            "Labels": {
                "architecture": "x86_64",
                "build-date": "2021-03-10T06:09:00.139818",
                "com.redhat.build-host": "cpt-1007.osbs.prod.upshift.rdu2.redhat.com",
                "com.redhat.component": "ubi7-container",
                "com.redhat.license_terms": "https://www.redhat.com/en/about/red-hat-end-user-license-agreements#UBI",
                "description": "The Universal Base Image is designed and engineered to be the base layer for all of your containerized applications, middleware and utilities. This base image is freely redistributable, but Red Hat only supports Red Hat technologies through subscriptions for Red Hat products. This image is maintained by Red Hat and updated regularly.",
                "distribution-scope": "public",
                "io.k8s.description": "The Universal Base Image is designed and engineered to be the base layer for all of your containerized applications, middleware and utilities. This base image is freely redistributable, but Red Hat only supports Red Hat technologies through subscriptions for Red Hat products. This image is maintained by Red Hat and updated regularly.",
                "io.k8s.display-name": "Red Hat Universal Base Image 7",
                "io.openshift.tags": "base rhel7",
                "name": "ubi7",
                "release": "338",
                "summary": "Provides the latest release of the Red Hat Universal Base Image 7.",
                "url": "https://access.redhat.com/containers/#/registry.access.redhat.com/ubi7/images/7.9-338",
                "vcs-ref": "a4e710a688a6374670ecdd56637c3f683d11cbe3",
                "vcs-type": "git",
                "vendor": "Red Hat, Inc.",
                "version": "7.9"
            }
        },
        "Architecture": "amd64",
        "Os": "linux",
        "Size": 2778060115,
        "VirtualSize": 2778060115,
        "GraphDriver": {
            "Data": {
                "LowerDir": "/var/lib/docker/overlay2/49d83ba2eb50cdbfc5a9e3a7b4baf907a9b4326aa0710689f602bb3cff01d820/diff:/var/lib/docker/overlay2/ba54659cc4ec10fa84edc49d5480ebe4897629f841d76ae79a4fb0c2edb791a5/diff:/var/lib/docker/overlay2/2238ae349d70686609b990b63c0066d6e51d94be59801a81c7f5b4d97da1fe02/diff:/var/lib/docker/overlay2/704708b72448f8a4750db3aabd43c12f23ad7e6d3f727aa5977bd7ac4db8e8cb/diff:/var/lib/docker/overlay2/1b47e1515517af553fd8b986c841e87d8ba813d53739344c9b7350ad36b54b0b/diff:/var/lib/docker/overlay2/0a580802a7096343aa5d8de5039cf5a011e66e481793230dced8769b024e5cd2/diff:/var/lib/docker/overlay2/4da91655770b0e94236ea8da2ea8ff503467161cf85473a32760f89b56d213ff/diff:/var/lib/docker/overlay2/401c640771a27c70f20abf5c48b0be0e2f42ed5b022f81f58ebc0810831283ea/diff:/var/lib/docker/overlay2/8985c59d1ab32b8d8eaf4c11890801cb228d47cc7437b3e9b4f585e7296e4b6a/diff:/var/lib/docker/overlay2/ec66f9872de7b5310bac2bd5fd59552574df56bb06dcd5dd61ff2b63002d77ed/diff:/var/lib/docker/overlay2/fcf40217c8477dcf4e5fafc8c83408c3c788f367ed67c78cb0bc312439674fcf/diff",
                "MergedDir": "/var/lib/docker/overlay2/8bcf7bf60181d555a11fb8df79a28cb2f9d8737d28fe913a252694ba2165c1d1/merged",
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]

---

我通过调试bash脚本并了解到它提供了一个自定义目录来运行脚本，从而解决了这个问题。我相信这些将在db2服务启动后运行。虽然我怀疑我可以指定一个入口点，但它不一定能很好地与ibmcom/db2容器配合使用。下面是我的docker compose文件，显示了我用于此特定容器的卷装载

注意：我认为这是以“绑定”格式定义挂载，而不是更常见的卷。我的方法允许我选择源数据存储的位置，而如果我指定了一个卷，它会在我的WSL系统上选择一些奇怪的位置来持久化卷数据。可能有更好的方法，但我仍在学习Docker构建

version: "3.2"
services:
  ssc-file-generator-db2-test:
    container_name: "ssc-file-generator-db2-test"
    image: ibmcom/db2:latest
    hostname: db2server
    privileged: true
    ports:
      - 50100:50000
      - 55100:55000
    networks:
      - back-tier
    restart: "no"
    volumes:
      - setup-sql:/setup-sql
      - db2-shell-scripts:/var/custom
      - host-dirs:/host-dirs
# Uncomment below to use database outside the container
#     - database:/database  
    env_file:
      - acceptance-run.environment
networks:
  back-tier: {}
volumes:
  setup-sql:
    driver: local
    driver_opts:
      o: bind
      type: none
      device: ./setup-sql  
  db2-shell-scripts:
    driver: local
    driver_opts:
      o: bind
      type: none
      device: ./db2-shell-scripts
  host-dirs:
    driver: local
    driver_opts:
      o: bind
      type: none
      device: ./host-dirs